Ventilator



C. HOFSTET'TER.

VENTILATOR.

APPLCA 4,1918. 1,349,764. Patented Aug. 17, 1920,

uw ///f Il Hnhhlm l l r l l l UNITED sTAij-ps PATENT OFFICE.

CHARLES I-IOFSIEJ?TER,` 0F PEORIA, ILLINOIS.

VENTILATGR.

Application filed `October 4, 1918.

To all whom t may concern.'

Be it known that I, CHARLES I-Ions'rn'rfrnn, citizen of the United States,V residing at Peoria, in the county of Peoria` and State of Illinois, have invented certainnew and useful Improvements in Ventilatore; and I do hereby declarethatthe following; is a iull, clear, and exact. description of the invention, which will enable others sliilled` inthe art to which it appertains to make and use the same.

This invention relates to improvements in ventilators, pertaining more particularly to ventilators `for use on buildings.

One of the objects ofy the invention isthe provision of a structure in which a perfect draft will be assured at all times, due to the large opening provided for the ventilating pipe. Also ,the provisionof a `structure that will prevent down drafts,v and. a valve or damper which in timeszoflire willbe automatically released to closey upon` the `said pipe.,

Another object is the provisionof a structure wherein therewill be no places oit lodg ment upon which birds will be able to construct nests which would` reduce the area of the outlet therefrom or obstruct the dralt.

Still` another object, is the provision oif a structure, parts of `which can be readily removed on short notice in order to make repairs.

To the end that my invention may` be understood, I have provided theaccompanying drawing', showingthe preferred embodiment of my invention, it being understood that slight changes may be made as maybe sup gested to the practical person.

Figure 1 shows my invention in elevation, partsbeing broken away to clearlyillustrate the relation of. the various elements one to another.

Fig. 2 is a plan ol the same; and, l

Fig. Bshows certain parts, in perspective.

1 indicates the usual eduction pipe or flue communicating with` the space to` be ventilated. 2is a skirt surrounding the salne and extending at its ends above and b elow the open end of said` pipe. Said skirt 1s spaced from the pipe 0r flue preferably.. flarlng toward its upper end; as shown to create a continuously increasing space around the said pipe. n

3 indicates a series of vertically disposed braces, one of which is shown in perspective Specification of Letters Patent.

Patented A110-, 17, 1920.

seriaino. 256,892.

in Fig. 3, which serve to secure the skirt to the pipe, saidbracesbeing spaced around the latter substantially as shown.

One edge ot the brace is` provided with a flange 4 to secure it. to the pipe 1 by means of bolts5,.for example, while the other` edge has the iange portions 6, Fig. 3, by which tosecule it to the inner surface of; the shirt 2 by means of bolts 7, torA example.

8 indicates a series of braces, each ol' which is provided at one end with a i'lange 9 and at its opposite edge with` a flange 10. These braces are secured by means ot bolts 11, Figs. 1 and 3, to the upper end of the braces 3, being inclined at an angle toireceive thereon a conically itoinned` ring 12, securedlby means el bolts `or rivets 13 to the flanges 10.

Lying directly above the opening of: the pipe or ilue 1 and between` it andthe ringI 12 is a cone-shaped cap 14 whose apex is substantially in line with the axis oi said pipe or flue. Thiscap is supported in position by being; secured tothe 'flanges `S) of the braces 8 by meanso'f bolts or rivets 15.

The said conical ring.;r 12 is off such area and is so positioned that its upper edge entends over the outer edge ol" the cap while the lower edgeof said ring;y extends down toward the skirt 2,

16 is a valve or damper which may be made in the torni oil? two concs whose base1 are secured together, the edge oi the upper cone portion projecting beyond the lower one and adapted to lieupon the endiotf the pipe or lue, when in its closed ijiositiou, as shown in broken lines.

17` is indicative of a pulley or other suitable portion suspended from the ape); oi.: thecap 14, and 18 is a chain attached at one end to the said valve or damper and extending; up through the pulley and then down through the valve or damper and the flue 1, said valve or damper preferably having;` a tube 19 extending; through it as a smooth guide for the said chain.

Inpractice the lower end of the chainmay cap will in no way reduce the area of the outlet of said pipe, the space between the pipe and the valve providing an area at least as great as that of the pipe l.

The conical form of the lower part of the valve serves to deflect the air outwardly toward the skirt which is then drawn upward and outward between the ring l2 and the skirt as well asupward and outward in the other direction between the said ring and the cap 14.

Preferably the said conical lower part extends nearly to the outer edge of the upper portion and thereby the ascending air passes out in a clean sweep or without creating an eddy beneath the upper portion as would occur were this lower part of greatly less diameter. Furthermore, this construction serves to properly center the valve when lowered upon the pipe, no other guide being necessary.

Preferably the braces 3 are recessed at 20, their vertical edges serving as guides for said valve or damper in its vertical movements.

As the normal position of the valve is its raised position-as shown in continuous lines in Fig. l, there are no surfaces upon which birds can build their nests the presence of which would reduce the draft area.

'IheV spaces between the several parts of i the structure are at least equal to or greater in extent than the area of the pipe l so that the Ldra-ft is in no way interfered with under the most exacting conditions.

Strong winds striking the pipe 1 will be deflected upwardly between the skirt and the pipe through the spaces between the braces passing out through the upper openings described and assist m cre-ating a` stronger upward draft through said pipe.

By extending the braces 3 downwardly for a short distance below the skirt they assist in deliecting the wind upward.

A convenient feature in my construction is that in case of repairs required inside the device the removal of the bolts 11 will permit the cap 14, the valve 16 and the rino' l2 with its braces 8 to be removed bodily which has been found to be of considerable advantage.

The area of the inlet 'at the bottom of the skirt ofmy device is at least equal to that of the pipe and at the upper end the area is very much greater so that the air ascending between the skirt and pipe as well as that passing ont of the eduction pipe itself is readily liberated, there being no choking. On the contrary-the draft is increased because of the ease of passage of the air.

In addition, the cap la is but little greater in diameter than the pipe-opening so that the air is not forcedto move outward and downward beneath it as in older types, but has an almost direct upward path of escape,

thc said ring l2 being inserted lo prevent down drafts.

Having thus described my invention, l claim l. The combination with a' ventilator including an eduction pipe, of a valve or damper for closing the pipe having a conically formed upper portion greater in diameter than the diameter of the pipe, said valve including an inverted cone shaped portion beneath and slightly smaller than the said upper portion and substantially the same diameter as the pipe, adapted to guide the valve to its seat upon said pipe.

2. In a ventilator, in combination, an eduction pipe having an open end, a skirt surrounding the upper end of said pipe and spaced therefrom, a series of braces connecting the skirt and the pipe and having substantially vertical inner edges near said pipe, a support above said pipe opening, a valve or damper adapted to seat upon the end of the pipe, a member to suspend the valve from said support, the described vcrtical edges of the braces forming guides .for said valve.

3. In a ventilator, in combination, an eduction pipe having an open upper end, a skirt encircling the same and spaced therefrom, a cap spaced above the opening of the pipe, the outer marginal edge of said cap lying inside the skirt and spaced therefrom, and a ring having its inner marginal edge spaced above the outer marginal portion of the `said cap, thc outer marginal edge of said ring being spaced from the skirt and ovcrhanging the space between it and said pipe, a valve or damper suspended from the cap, ils plane being parallel to the plane, of the open end of the pipe, and normally spaced from the opening and adapted to close the same, and means to guide the valve lo its seat upon Isaid opening.

4l. In a ventilzixtor,in combination, an eduction pipe having an open upper end, a skirt surrounding the said pipe at said upper end and extending above the opening thereof, braces connecting the skirt and pipe, a cap supported in spaced relation above said opening, a valve suspended beneath the same adapted for closing the said openilr;lbut normally spaced therefrom, a. ring having its inner marginal edge spaced above the marginal edge of the cap and its outer marginal edge overhang-ing the space between thc skirt and the pipe, means l'or securing the ring to the cap in spaced relation and detachably secured to the braces, the said cap and ring and said valve being bodily removable -from said braces.

5. In a ventilator, in combination, an eduction pipe, a skirt surrounding the same extending both above and below its open end, a series of braces secured to the pipe and said skirt spacing the latter from the former,

lll)

lll() the bi'aees constituting a series of Walls In testimony whereof I eix my signature forming Vertileal passages betwen the seici in presence oi" two Witnesses.

skirt and sait pipe, e eap over an ing and spaced above the pipe, and a eonipizel ring i CHARLES HOFSFIETTER' overhzmging the passages spaced at its outer Witnesses:

marginal edge from the skirt and overhang- L. E. SUTHERLAND,

ing the outer marginal edge of the said cap. FRANK I. EYNATTEN. 

